Across
- 1. Vascular System Fluid-filled system used for movement in echinoderms
- 7. Free-swimming, bell-shaped body form of cnidarians
- 8. Animals that rely on external heat sources
- 9. To shed an outer layer or exoskeleton
- 12. Living on or near the ocean floor
- 13. Bladder Organ that helps fish control buoyancy
- 15. Sessile, tube-shaped body form of cnidarians
- 16. Internal skeleton inside the body
- 17. Animal with a backbone
- 19. Organism with both male and female reproductive organs
- 20. Organ that nourishes developing embryos in mammals
Down
- 2. No body symmetry at all
- 3. Animals that regulate their own body temperature
- 4. Asexual reproduction where a new organism grows off the parent
- 5. Animal without a backbone
- 6. Flexible connective tissue found in some skeletons
- 8. Hard outer covering for protection and support
- 10. Eggs Eggs with a protective membrane for land development
- 11. Symmetry Body divided into equal left and right halves
- 14. Glands Organs that produce milk in mammals
- 18. Symmetry Body parts arranged around a central axis